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DOI | 10.1029/2018JD028657 |
Modeling of Nonlocal Thermodynamic Equilibrium Effects in the Classical and Principal Component-Based Version of the RTTOV Fast Radiative Transfer Model | |
Matricardi, Marco1; Lopez-Puertas, Manuel2; Funke, Bernd2 | |
2018-06-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:11页码:5741-5761 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Spain |
英文摘要 | The direct assimilation in 4D-Var of principal component (PC) scores derived from Infrared Atmospheric Sounding Interferometer (IASI) spectra has recently been demonstrated. To maximize the exploitation of the IASI instrument, a future step is to consider the extension of the PC approach to the extraction of information from the 4.3-m CO2-absorbing region. Shortwave IASI channels are currently underused compared to similar longwave channels because of day-night variations in data usability due to departures from local thermodynamic equilibrium (LTE). In this paper, we document the introduction of non-LTE (NLTE) effects in the PC-based version of the radiative transfer for TIROS operational vertical sounder (RTTOV) fast radiative transfer model (PC-RTTOV). The inclusion of NLTE effects in PC-RTTOV has required the development of a parameterized scheme that allows the fast computation of a NLTE correction to LTE radiances. The fast NLTE model is general enough to be applied to any sensor and can be utilized to add a fast and accurate NLTE correction to polychromatic LTE spectra computed by any general radiative transfer model, including RTTOV, which now incorporates the fast NLTE model developed in this study. The accuracy of the NLTE correction is such that daytime and nighttime radiances can be simulated to almost the same degree of accuracy. The comparison with IASI observations shows that the fast NLTE model presented here performs significantly better than the fast NLTE model incorporated in the previous version of RTTOV and also that improvements have to be made to the simulation of NLTE effects at winter high latitudes. |
英文关键词 | infrared emission non-LTE satellite sounding fast radiative transfer model principal component analysis Earth' s atmosphere |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000436110800001 |
WOS关键词 | RESOLUTION ; CO2 ; ASSIMILATION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32008 |
专题 | 气候变化 |
作者单位 | 1.ECMWF, Reading, Berks, England; 2.CSIC, Inst Astrofis Andalucia, Granada, Spain |
推荐引用方式 GB/T 7714 | Matricardi, Marco,Lopez-Puertas, Manuel,Funke, Bernd. Modeling of Nonlocal Thermodynamic Equilibrium Effects in the Classical and Principal Component-Based Version of the RTTOV Fast Radiative Transfer Model[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(11):5741-5761. |
APA | Matricardi, Marco,Lopez-Puertas, Manuel,&Funke, Bernd.(2018).Modeling of Nonlocal Thermodynamic Equilibrium Effects in the Classical and Principal Component-Based Version of the RTTOV Fast Radiative Transfer Model.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(11),5741-5761. |
MLA | Matricardi, Marco,et al."Modeling of Nonlocal Thermodynamic Equilibrium Effects in the Classical and Principal Component-Based Version of the RTTOV Fast Radiative Transfer Model".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.11(2018):5741-5761. |
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